#!/usr/bin/env ruby -w
#
# Birthday Helper
# "Learn to Program" by Chris Pine, p. 114
#

require 'time'

all_birth_days = {}
all_birth_years = {}
file = File.read('birthdays.txt').split("\n")
file.each do |line|
    name, day, year = line.split(',').collect { |s| s.strip }
    all_birth_days[name] = day
    all_birth_years[name] = year
end

print "Who? (or 'quit') "
s = gets.chomp
while s.downcase != 'quit'
    birth_day = all_birth_days[s]
    birth_year = all_birth_years[s]

    if birth_day.nil?
        puts "I don't seem to have a birthday recorded for #{s}"
    else
        birth_day_t = Time.parse(birth_day)
        current_year = Time.new.year
        current_birth_day = Time.mktime(current_year, birth_day_t.month, birth_day_t.day)
        if Time.new > birth_day_t # passed it
            birth_day_t = birth_day_t + (60 * 60 * 24 * 365.25)
        end
        age = current_year - birth_year.to_i
        puts "#{s}'s #{age}th birthday is #{birth_day_t}"
    end
    print "Who (or 'quit')? "
    s = gets.chomp
end